Educational information, not medical advice — ask your doctor or midwife.
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Xiang Ru is a dried herb used in Chinese medicine. It is one herb on its own, not a formula. It comes from the flowering tops and leaves of a scented mint called Mosla (Mosla chinensis, and in some areas Elsholtzia ciliata).
It is best known for one narrow job. That job is a summer chill caught in hot weather, with fever, chills, a heavy head and no sweating.
Old texts also gave it for stomach upset in hot weather, with cramps, vomiting and loose stools. It was used as well for mild puffiness with little urine. The plant is strongly scented, and the tea smells and tastes like a sharp, slightly bitter mint.
Here is the honest evidence picture. Xiang Ru has been used in Chinese medicine for centuries. We could not find any published human trial of it.
Long use tells you a herb has been trusted. It does not tell you that it works. That applies to everything on this page.
The short answer is that nobody has shown how it works in people. Everything below is an idea, not a proven mechanism (a known way of acting in the body).
In Chinese medicine, Xiang Ru is called acrid (sharp-tasting) and slightly warming. It is said to open the surface of the body and bring on a light sweat. It is also said to settle the stomach and move fluid out through the urine.
Older texts nickname it "summer's Ma Huang". They used it in hot weather the way Ma Huang (ephedra) was used in winter.
In the lab, the herb's volatile oil slows the growth of some bacteria and viruses in a dish. Effects in a dish often fail to show up in a living person. So this is a reason to study the herb, not a reason to expect a result.
Xiang Ru comes in a few forms. Most of them are made from the dried herb.
- Dried loose herb, cut for making a decoction (a simmered tea). - Granules or a powdered extract that dissolve in hot water. - Capsules or tablets of dried extract.
Two other forms work differently:
- As one ingredient inside classical Chinese formulas. - Essential oil, a strong, concentrated product that is not the same thing as the tea.
Most practitioners use the dried herb or the granules. The essential oil is far stronger. It is not meant to be swallowed.
Xiang Ru shows up in Chinese herb texts from about the third to fifth century CE. It is also listed in the Ming dynasty Ben Cao Gang Mu.
It became a warm-weather staple. It was given when someone spent a hot day outdoors, cooled off too fast, then came down with chills and a blocked, sweatless fever.
The related plant Elsholtzia ciliata is eaten in Korea and Vietnam. There it is a common kitchen herb and a folk remedy.
See a doctor if your fever lasts more than three days, goes above 39C (102F), or keeps coming back. Get medical help straight away for a stiff neck, a rash that does not fade when pressed, confusion, trouble breathing or chest pain.
Also get checked if you cannot keep fluids down, if you pass little or no urine, if you feel faint when standing, or if swelling in your face, legs or belly is new or getting worse. Stop the herb and seek advice if you develop a rash, itching or any swelling of the lips or tongue.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
Reviewed by the HealisticMD editorial team How we grade evidence →
The published evidence for Xiang Ru is weak or absent. That usually means no controlled trial has tested it, not that a trial found it ineffective — the two are different, and we grade only what has been published.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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